Dose Course 2018_Flipping book

Change of vs: Example Eclipse

6 MV X-rays

2

2

2

2

N

   

   

1

N

z

z

D

D

1

   

 

   

 

   

 

   

  





2 20

2 50

2 80

2 20

2 50

2 80

 = i 1

max

50

10

20

 = i 1

I

d

+ +  d

d

+ + +  i d d d '

=

'

'

I

=

+

+

+

1

2

N

4

mm1

mm1

%1

%1

N

6

i

Dose

PDD

PDD differences up to 8mm and 3%.

MU differences up to 2%

Profiles

Vs 13.5 uses a calculated spectra while the previous vs use a theoretical spectra.

Gamma 3%-3mm

N

1

2 abs

 = i 1

I

D

=



3

N

Thanks to Artur Latorre-Mussoll Servei de Radiofisica Hospital Sant Pau